Hi Siva,
But this should be happen only with vCenter involved right?
Well I also frowned when reading you removed the vCenter from the picture. But then reread the issue and it says: "Whenever vCenter Server does not provide an SSL thumbprint for the target host" so this could also be interpreted as: if vCenter is missing then there will never be thumprint and so the issue is caused too.
Keen to hear your findings with the 5.0 version